Machine for turning irregular objects



April 28, 925. 1,535,673

H. F. LOEWER v MACHINE FOR TURNING IRREGULAR OBJECTS Filed Aug. 8, 1923 2 Sheets-Sheet l F wu. m-

l l 1 1 u 1 x INVEN TOR. Hcizrg fiqewgtr fab ATTORNEYS.

April- 28, 1925.

MACHTNE FOR TURNING IRREGULAR OBJECTS 1,535,673 H. F. LOEWER 2 Sheets-Sheet. 2.

Filed Aug 8, 1923 INVENTOR.

Henry 156 newer fuls ATTORNEYS.

latented Apr. 22d, lQZfa M-WWW m.

HENRY E. LOEVTELR, OF YORK.

MACHINE FUR T'U'LHJHING IRREGULAR QIBJEGT$.

Application filed E3, 19%. Serial No. 656,321

To all whom it may concern:

, Be it known that I, Harm; F. Louwnn, a citizen of the United States, and resident of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Machines for Turning; Irregular Objects, of which the following is a specification. The present invention relates to machines for turning irregular objects, and an object thereof is to provide a machine in which the cutting tool shapes the work piece in accordance with a model, so thatthe grin-ding); or finishing operations on the work piece following the cutting operation are reduced to a niniinunrand an article is ob tained which closely ap roxnnates the model. Anotherobject of the invention is to provide a cutter whichtorms a wide groove in the work piece so that by :overlapping the grooves an article is obtained substantially free from ridges, thus reducing the finishing operations on the article to a minimum.

'lothese and'other ends, the invention 1 consists of certain parts and con'ibinations out in the appended claims.

so In the drawings Fig. llis a side view partially in section of a cutting tool employed in the present invention; 1 I

Fig. 2 is a side view at right angles to :5 that shown in Fig. 1; i

Fig. 3 is an end view gr a i Fig. a is a section on the line 1-4, r; a

Fig. 5 is an edge view of one of the out 4 0 tiugrings, y 1 l ig. 6 is a side View ol. the same rmu'; l l" is an odgcview of ai'iother cutting i I l 8 a side View oi. the same ring;

at ,l igg, 9 is a plan View of a lathe or u'iachiue touturning lasts, parts of the machine being removed; and v Fig. 10 is a detail View of a fragment of a last showing the manner in which successive cutting operations take place.

In this machine 1 indicates the main frame and. the swinging frame 2 which carries the model 3 and the work. piece l, the model cooperating with follower 5 and the work piece being engaged by the cutting tool which is supported on a shaft 6 turned. about an axis at an angle other than a right angle tothe axis of turning of the worl: piece 4-. The general construc tion of this inachineis old and well-known inlast turninp' lathes and will not be further described in'detail.

The feature of this invention relates more particularlyto the construction of the cut ting tool in which 7 indicates the shaft of the cutter having a screw threaded portion C d at one end detachably engaged with the 11, the cutting; edges 11 of eachpro ection being arranged at an oblique angle to the axisof the ring, the projections on adjacent rings being out of line and projecting ia'rther from the center of the tool than those on the ring next to it on the side away from the free end of the too].

At the free end of the tool, a plurality of are shaped cutters 12 are provided.

These cutters are" supported on a head 13 in the form of an enlargement integral with the shaft? at the free end of the latter. This head has, in this instance, two sides, each provided with an undercut guideway 1A in which a slide 15 is adjustable, such slide being; held in its adjusted position by a screw 16 which passesthrough the slide 15 and engages the bottom of the undercut guideway 14. At the ends of the guide- 'ways 14 two, abutment blocks 17 are,se-

cured by screws 18, the head being recessed at 19 so thatthe bloclzsmay be held in the recess andthc blocks having bevelled proections 20 on opposite slides progecting in abutment with the sides of undercut guide The blocks 17 way 14; as shown in Fig. 1. project in opposite directions one in the guideway 14; on onesideof the head and the other in the guideway 14-1 on the oppolsite side of the head. Abutment screws 21 are adjustable in the abutment blocks 1'? and cooperate with the slides 15 to remove the strain from the securing screw 16;

Each knife holding slide 15 carries one of the arcuate knives 12 whichhas a flange 32 abutting the slide lhnnd securedthere to by a screw 22. The cutting edge 12" of each knife is a segment of a circle except that the forward end of the tool where it is projected at a short distance tangentially to the segmental circular portion. The center of this circle is so positioned, that, if the circle were continued, it would intersect the center of the rotation of the tool, or in other words the center of the cutting edge is nearer to the center of rotation of the tool than to the cutting edge, thus making it possible to provide an arcuate cutting edge which will make a wide groove in the .vorlcpiece. As the groove is wide it is possible to overlap the grooves cut in the work piece as shown in Fig. 10 and in this way practically to eliminate any ridges on the finished article, thus making it possible to sand-paper the article or last without any extended grinding operation to remove the ridges and, at the same time, enablingthe finished article or last to be practically a duplicate of the model. As the plane ofeach cutter may be shifted transversely of the axis of rotation of the cutting tool, it is possible to increase or decrease the depth of the out.

It will be noted that the centers of the arcs ofthe are shaped cutters extend transversely of the axis of rotation of the cutting tool and that the distance between the center of each of the cuttingedges or in other wordsthe' radius of the are shaped cutting edge is greater than. the distance between the center of an arc shaped edge and the axis ofrotation of the tool .thus inaltiiur it possible to provide a tool of reduced diameter and. at the same time; obtain cutting edges, which will provide wide grooves in the work piece. it will also be noted tha: the inner ends of these are shaped cutting edges it extended would intersect: the plane of the adjacent ring cutter and in fact do extend into such plane between the cutting projections of the latter, so that there is no gap bet-ween the are shaped cutters and the ring cutter. Furthermore, the tangential projection of the ends of the are shaped cutters at the end Oifl'l'lQ tool makes it pos sible to cut at the extreme end of the tool, so that a: tool isobtaincdwhich closely approxintiates the model follower.

The advantage o't adjusting; the cutters transversely of the axis of the tool is that it is possible at. all times to cause the cutting edges to liein the desired relation to the axis, notwithstanding the fact that the cutters ma be worn down through sharpening which, when the cutters are not adjustable, tend to reduce the accuracy of the cutting tool. hen adjustable in this way the cutters can be made to conform to the follower or guide wheel even after an extreme sharpening of the cutters, as not only the diair ater of the tool. as a whole is maintained. butthe radius of the different cutters is maintained.

hat I claim as my invention and desire to secure by Letters Patent is 1. A machine for turning irregular objects having a rotary cutting tool with an arc shapedcutting edge, the radius of which is of greater length than the distance betwcen the center of the arc and the center of the axis of rotation of the tool and lllfiilllc'. permitting the adjustment of the cutt s on lines extending transversely of the 2 rotation of the tool.

A machine for turning irregular objects having a rotary cutting tool formed with two are shaped cutting edges on opposite sides of the axis thereof. the centers of the arcs of the two cutters extending transversely of the axis of rotation of the tool and the ditt'erence between the center of each arc and the axis of rotation being less than the radius of the arc and means permitting the adjustment of the cutters on lines extending transversely of the axis. of rotation of the tool.

3. A machine for turning irregular objects comprising a rotary cutting tool haring a head formed with transversely extending guides on opposite sides and two are shaped cutters adjustable on said guides on lines extendingtransversely of the axis of the tool and each having the center (it the are extending transversely of the era's of rotation of the tool.

4. A machine for turning irregular oi jccts comprising a rotary cutting tool haw ing two undercut guidewavs on o posit sides thereof, two cutter carriers adjustable on said guideways on lines extendingtrains versely of the axis of rotation ot the tool. and two cutters having are shaped cuttiurz' edges. the center of each of which extends transversely of the axis of rotation of the tool.

A machine for turning irregular objects. comprising a rotary cutting tool b. ing two undercut guidewavs on oppo sides thereof, two cutter carriers adjustable on said guidcways'on lines extending transversely of the axis of the tool. and two cu e ters having are shaped cutting edg center of each of which extcndslransvc of the axis of rotation of the tool ite the

nearer to the center of rotation of the loo! than the distance between said center and the are shaped cutting edge of a cutter.

next to it on the side of the free end of the tool, and are shaped cutters between the "free end of the tool and the rings, the centers of said "are shaped cutters extending transversely of the axis of the tool.

7. A machine for turning irregular objects comprising a cutting tool including a shaft, a series of cutter rings surrounding said shaft, each havingtwo diametrically arranged cutting projections, each cutting pro ectlon having a cuttlng edge arranged at an angle to the projection of the ring and the projection on the adjacent rings being out of line and projecting farther from the center of the tool than those on the rings next to it on the side of the free end of the tool, and are shaped cutters between the free end of the tool and the rings, the centers of said are shaped cutters extending transversely of the axis of the tool, the arcs being such that if extended they Would intersect the plane of the ring cutter next the are shaped cutters.

HENRY F. LOEVVER. 

